A novel concept of acousto-optic ring frequency shifters on silicon-on-insulator technology

作者：Fan, Guofang^*; Li, Yuan; Hu, Chunguang; Lei, Lihua; Zhao, Dong; Li, Hongyu; Zhen, Zhen

来源：Optics and Laser Technology, 2014, 63: 62-65.

DOI：10.1016/j.optlastec.2014.04.001

• Acousto-optic (AO) ring frequency shifter on SOI technology
• Surface acoustic waves
• The resonance wavelength shift

In this paper, a ring frequency shifter using surface acoustic waves (SAW) is developed on a silicon-on-insulator (SOI) technology, in which, a design is introduced to make SOI waveguide piezoelectric by putting ZnO on SOI layer. A simulation shows that the refractive index change of SOI waveguide with an overlayer of ZnO is about 10(-3) by SAW of 100 mW. A finite-difference time domain (FDTD) is used to model the new concept of a ring frequency shifter using SAW of 100 mW. The results show that the resonance wavelength of a ring resonator with a radius of 50 mu m shifts 22.7% of a free spectral range (FSR) due to the refractive index change of waveguide by SAW without change in transmission on resonances and finesse, a tiny change in bandwidth, Q-factor and FSR of a ring resonator.

• 出版日期2014-11
• 单位天津大学; 复旦大学; 中国科学院理化技术研究所; 上海市计量测试技术研究院